"Olivia! Hey! It's Dakota! Thank you so much for asking me to tell you how I wash my hands, because I've been waiting my whole life for someone to ask me to do that," Johnson says to the camera by way of introduction. She gesticulates a lot while speaking, hands moving pretty frenetically.

And as she begins walking her audience through the paces of getting water running and using a soap dispenser, it becomes clear that those are definitely not her hands flapping all over the place.

At one point the dispenser falls into the sink, and things get sillier from there on out.

"I like to scrub them really, really fast, but I like to lower them a little bit because sometimes I hit myself in the face," says Johnson. Then some soap gets in her hair, and Martin begins to attend to her brunette locks.

"Oh, and then I like to wash my hair if it's dirty because sometimes my dirty hair gets in the way," she quips.

Over the past few weeks, actors, musicians, the CDC and school experiments have been showing us the importance of taking our time to really scrub those hands properly. In general, a washer needs to spend at least 20 seconds, or the equivalent of singing "Happy Birthday" twice, at the sink.

But so far we haven't heard that you have to wash your hair each time. Even if you want to become a champion!